Quarterly report pursuant to Section 13 or 15(d)

Outstanding Loans and Leases Outstanding Loans and Leases - Consumer Real Estate - Modification Programs (Details)

v2.4.1.9
Outstanding Loans and Leases Outstanding Loans and Leases - Consumer Real Estate - Modification Programs (Details) (Consumer Real Estate, USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Financing Receivable, Modifications [Line Items]    
Carrying Value $ 1,824us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 $ 1,475us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 1,640us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember 		1,335us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
Home equity
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 184us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember 		140us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
Modifications under government programs
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 105us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember 		268us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember
Modifications under government programs | Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 91us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember 		234us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember
Modifications under government programs | Home equity
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 14us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember 		34us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember
Modifications under proprietary programs
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 129us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		218us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Modifications under proprietary programs | Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 98us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		210us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Modifications under proprietary programs | Home equity
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 31us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		8us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Trial modifications
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 1,436us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationNameAxis
= bac_TrialModificationsMember 		731us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationNameAxis
= bac_TrialModificationsMember
Trial modifications | Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 1,340us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationNameAxis
= bac_TrialModificationsMember 		693us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationNameAxis
= bac_TrialModificationsMember
Trial modifications | Home equity
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 96us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationNameAxis
= bac_TrialModificationsMember 		38us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationNameAxis
= bac_TrialModificationsMember
Loans discharged in Chapter 7 bankruptcy
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 154us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ChapterSevenBankruptcyMember 		258us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ChapterSevenBankruptcyMember
Loans discharged in Chapter 7 bankruptcy | Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 111us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ChapterSevenBankruptcyMember 		198us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ChapterSevenBankruptcyMember
Loans discharged in Chapter 7 bankruptcy | Home equity
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 43us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ChapterSevenBankruptcyMember 		60us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ChapterSevenBankruptcyMember
Contractual interest rate reduction | Modifications under government programs
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 87us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember 		237us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember
Contractual interest rate reduction | Modifications under government programs | Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 76us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember 		213us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember
Contractual interest rate reduction | Modifications under government programs | Home equity
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 11us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember 		24us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember
Contractual interest rate reduction | Modifications under proprietary programs
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 52us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		139us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Contractual interest rate reduction | Modifications under proprietary programs | Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 50us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		135us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Contractual interest rate reduction | Modifications under proprietary programs | Home equity
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 2us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		4us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationAxis
= bac_ContractualInterestRateReductionMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Capitalization of past due amounts | Modifications under proprietary programs
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 32us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_CapitlizationOfPastDueAmountsMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		22us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_CapitlizationOfPastDueAmountsMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Capitalization of past due amounts | Modifications under proprietary programs | Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 30us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_CapitlizationOfPastDueAmountsMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		21us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_CapitlizationOfPastDueAmountsMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Capitalization of past due amounts | Modifications under proprietary programs | Home equity
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 2us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationAxis
= bac_CapitlizationOfPastDueAmountsMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		1us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationAxis
= bac_CapitlizationOfPastDueAmountsMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Principal and/or interest forbearance | Modifications under government programs
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 3us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember 		10us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember
Principal and/or interest forbearance | Modifications under government programs | Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 0us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember 		1us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember
Principal and/or interest forbearance | Modifications under government programs | Home equity
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 3us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember 		9us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember
Principal and/or interest forbearance | Modifications under proprietary programs
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 13us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		32us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Principal and/or interest forbearance | Modifications under proprietary programs | Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 11us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		29us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Principal and/or interest forbearance | Modifications under proprietary programs | Home equity
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 2us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember 		3us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember
/ bac_LoanRestructuringModificationAxis
= bac_PrincipalInterestForbearanceMember
/ bac_LoanRestructuringModificationNameAxis
= bac_ProprietaryModificationsMember
Other modifications | Modifications under government programs
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 15us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_OtherModificationsMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember 		21us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ bac_LoanRestructuringModificationAxis
= bac_OtherModificationsMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember
Other modifications | Modifications under government programs | Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
Carrying Value 15us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_OtherModificationsMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember 		20us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
/ bac_FinancingReceivablePortfolioSegmentAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_ResidentialMortgageMember
/ bac_LoanRestructuringModificationAxis
= bac_OtherModificationsMember
/ bac_LoanRestructuringModificationNameAxis
= bac_GovernmentModificationsMember
Other modifications | Modifications under government programs | Home equity
    
Financing Receivable, Modifications [Line Items]    
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Other modifications | Modifications under proprietary programs
    
Financing Receivable, Modifications [Line Items]    
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Other modifications | Modifications under proprietary programs | Residential Mortgage
    
Financing Receivable, Modifications [Line Items]    
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Other modifications | Modifications under proprietary programs | Home equity
    
Financing Receivable, Modifications [Line Items]    
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